Influence of support on catalytic activity of Ni catalysts in p-nitrophenol hydrogenation to p-aminophenol

摘要

The catalytic activities of kieselguhr-,TiO2-,and Al2O3-supported Ni catalysts in hydrogenation of p-nitrophenol to p-aminophenol were investigated.The supported Ni catalysts were characterized by N2 adsorption/desorption,X-ray diffraction,temperature-programmed reduction,and temperature-programmed desorption of ammonia techniques.The catalytic activities of the supported Ni catalysts were in an order of Ni/kieselguhr>Ni/TiO2>Ni/Al2O3.The acidities of the supported Ni catalysts were in an order of Ni/Al2O3>Ni/TiO2>Ni/kieselguhr.The acidity of the supported Ni catalyst significantly affected the catalytic activity.